No matter the scenario, bitcoin. Unless all electronics would die suddenly, but in that case you're living in a world where currency will be the least of your concern.

There is no best, any of them could have issues. If you pick a cryptocurrency, electronic infrastructure failing could easily prove you wrong. If you pick gold or silver, you could easily be refuted by mass confiscations like they did in the great depression era. If you have to pick one, there wo...

I bet Gold would be the best. Since gold is most independent from technology. But depends on the amount and time you want to store the value.

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